Question

what can you say about the correlation between the age of a car and its resale value?
a. the trend line slopes downward from upper left to lower right, so there is a negative correlation between a cars age and its resale value.
b. the trend line slopes downward from upper left to lower right, so there is a positive correlation between a cars age and its resale value.
c. the trend line slopes upward from lower right to upper left, so there is a positive correlation between a cars age and its resale value.
d. there is no correlation between a cars age and its resale value.

Explanation:

In a scatter - plot with a trend line, if the trend line slopes downward from upper left to lower right, as the value of one variable (age of car) increases, the value of the other variable (resale value) decreases. This indicates a negative correlation.

Answer:

A. The trend line slopes downward from upper left to lower right, so there is a negative correlation between a car's age and its resale value.